Features
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Wake-up Function for a Microcontroller with Preamble Detection
1 mVrms Sensitivity
1 µA Standby Current
Power Supply: 2V to 3.8V
Baud Rate: up to 4 kbps (ASK Modulation)
Operation Temperature: up to 125°C
Withstands +175°C
Few External Components
Interface IC for
125 kHz
Wake-up
Function
Application
• Tire Pressure Monitoring (TPM)
1. Description
The ATA5283 is a 125 kHz ultra-low power receiver used for the wake-up function of
Tire Pressure Monitoring (TPM) application. The sensitive input stage of the IC amplifies and demodulates the carrier signal from the antenna coil to a digital output signal
for a microcontroller. During the standby mode the preamble detection unit monitors
the incoming signal and activates the wake-up output and the data output, if the IC
receives a proper 125 kHz carrier signal.
ATA5283
By combining the IC with an antenna coil, a microcontroller, an RF transmitter/transceiver, a battery, temperature- and pressure sensor, it is possible to design a
complete Tire Pressure Monitoring system (TPM).
Figure 1-1.
Block Diagram
Battery
VDD
Lx
COIL
ATA5283
Amplifier
with AGC
RESET
Vref
Conditioner
Preamble
check
N_WAKEUP
N_DATA
TST1
TST2
GND
4598H–AUTO–03/07